CO2-selective membranes for hydrogen production and CO2 capture – Part II: Techno-economic analysis

Abstract

Syngas processing often requires separation of CO 2 and hydrogen for hydrogen production, and the resulting CO 2-enriched stream presents an opportunity for simultaneous CO 2 capture. For example, syngas-based integrated gasification combined cycle (IGCC) power plants are envisioned as an efficient means of producing power from coal where CO 2 capture technologies can be applied relatively easily. Membrane technology is an attractive approach for CO 2 capture because of inherent process advantages such as simplicity, reliability, compactness and modularity. This paper (Part II of a two-part study) performs techno-economic analysis for CO 2-selective membranes in three hydrogen production or utilization applications: methane reformer/pressure swing adsorption processes, oxygen-blown coal-fired IGCC power plants using GE gasification technology, and air-blown coal-fired IGCC power plants using Transport Integrated Gasification (TRIG) technology. These processes require membranes with CO 2 /H 2 selectivities of 10-20, which can be provided using Polaris TM membranes. Hybrid approaches using a combination of membrane and cryogenic processes are evaluated for the production of high-pressure liquid CO 2 ready for utilization or sequestration. The optimal membrane CO 2 /H 2 selectivity and influence of CO 2 capture rate on the cost of CO 2 capture are determined, providing general guidelines for future membrane development. The cost of CO 2 capture with these membrane processes depends not only on the feed CO 2 partial pressure, but on the feed CO 2 concentration as well.

Comprehensive Exergy Analysis of Three IGCC Power Plant Configurations with CO2 Capture

“…Figure 3 shows the overall process flow diagram. Since there has been less research into CO 2 -selective polymeric membranes than H 2 -selective polymeric membranes, we chose an optimistic value of CO 2 /H 2 selectivity of 50, which is greater than typical values for CO 2 /H 2 selectivity measured so far [16,[33][34][35][36], most of which are on the order of 10. In addition, we assumed that the selectivity of CO 2 to all other species was 50.…”

Optimization of coating solution viscosity of hollow fiber‐supported polydimethylsiloxane membrane for CO2/H2 separation

“…Currently, to reduce CO 2 emission to the atmosphere and alleviate global climate change, carbon capture and storage are imperative . Carbon capture from H 2 includes the separation of CO 2 from pyrolysis gas, coke‐oven gas, biomethane, and biohydrogen . Several available CO 2 /H 2 separation technologies have been developed.…”

Thermodynamics Process Simulation Based Design of High Performance Light Integrated Coal Gasification Fuel Cell Plant with Membrane-Based CO2 Capture Technology

“…The Polaris TM membrane has adopted to remove CO 2 emission from L-IGFC power plant [11] [12]. In practical separation application, the pressure ratio across the membrane is between 5 and 15 [13] but in this study, pressure ratio 10 was chosen.…”